I am reminded of a joke my uncle told me way back during the beatnik era.

A man was driving down the road when he saw a fellow hitch hiking. By his clothes and facial hair it was obvious he was a beatnik. The man stopped and picked him up. As they were driving done the road they came to an intersection and stopped. The driver looked to his left and asked the beatnik if anything was coming from the other direction. The beatnik said, "Nothing but a big dog, man." As the man stared across the intersection, his car was crushed by a bus. When he woke up in the hospital, he was in the same room as the beatnik. "I thought you said there was nothing but a big dog!" "Yeah man, a Greyhound."